How to tell managers they're wrong about UX research and still get hired

Heard these before? ‘Market research uses hundreds of people. How come you can get answers with just 5?’ ‘Our product is aimed at everyone, so we can use ourselves as users.’ ‘Users don‘t know what they want’ ‘Apple doesn‘t do user research so why should we?’ ‘Our agency does all of this for us.’ Here’s how to successfully counter each of these objections.